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Liability for Unpaid Losses and Loss Adjustment Expenses - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Jun. 30, 2024 | Dec. 31, 2023 | Jun. 30, 2023 | Dec. 31, 2022
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Decrease in liability for claims and claims adjustment expense reserve |  |  | $ 49,700 |  |  |  |  |
Unpaid losses and loss adjustment expenses | $ 460,437 | $ 551,007 | 460,437 | $ 551,007 | $ 344,648 | $ 510,117 | $ 663,019 | $ 1,038,790
Favorable development, net | 2,197 | (17,706) | 2,197 | (34,849) |  |  |  |
Direct losses and loss adjustment expenses | $ 342,218 | 308,860 | $ 836,149 | 770,161 |  |  |  |
Adverse Prior Years' Reserve Development |  |  |  |  |  |  |  |
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |
Direct losses and loss adjustment expenses |  | $ 17,700 |  | $ 34,800 |  |  |  |

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- Definition Amount of increase (decrease) in liability to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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